Indoor location with good ventilation free from corrosive gas and conductive dust.

Altitude

Below 1000M. It has to increase the soft starter rate power when the altitude is more than 1000M.

Temperature

-30 +55 oC

Humidity

90%RH without dew condensation.

Vibration

<0.5G

Structure

Enclosure

IP 20

Cooling

Natural wind cooling.

Tips: Can a soft starter control the induction motor in variable speed?A soft starter can NOT control induction motor speed, it only restricts motor starting current by applying the voltage in a ramp to avoid inrush current impact on the motor. To vary the speed, you should go for a variable frequency drive which can control the induction motor speed along with starting torque, but cost much more than a soft starter. The selection between VFD and soft starter depends on lots of factors, you can check our blog post regarding VFD vs Soft Starter for details.